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Are always specified on the rating plate – Siemens MICROMASTER 420 User Manual

Page 66

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3 Functions

Issue 07/04

MICROMASTER 420 Operating Instructions

66

6SE6400-5AA00-0BP0

IEC Motor

e.g.: Volts 230 V (Delta connection) / 400 V (Star connection)

U1

V1
W1

Star connection

W2

U1

U2

V1

V2

W1

Delta connection

U1

V1
W1

W2

U1

U2

V1

V2

W1

NEMA Motor

T

1

T

4

T

7

T

3

T

6

T

9

T

8

T

5

T

2

Volts

U

V

W

T

1

-T

7

T

2

-T

8

T

3

-T

9

low

T

4

-T

5

-T

6

T

1

T

2

T

3

high

Connected

together

Connection

T

1

-T

7

T

2

-T

8

T

3

-T

9

Y Y

Y

U

V

W

T

1

-T

6

-T

7

T

2

-T

4

-T

8

T

3

-T

5

-T

9

-

T

1

T

2

T

3

T

4

-T

7

T

5

-T

8

T

6

-T

9

∆ ∆

T

1

T

4

T

7

T

2

T

5

T

8

T

3

T

9

T

6

Volts

low
high

Connected

together

Connection

e.g.: Volts 230 V YY (low) / 460 V Y (high)

Fig. 3-18

Motor terminal box


The following must be noted when entering the rating plate data or the ESB data:

The rated motor voltage P0304, the rated motor current P0305 and the stator
resistance P0350 must always be entered in accordance with the motor circuit
configuration (either delta or star).

If the rated motor data that is available (P0304, P0305, P0350) does not match
the motor circuit configuration, then the appropriate conversion (refer to Fig.
3-19) must be made and then entered.

NOTE
The outer conductor voltage/phase-to-phase voltage (voltage U

12

between outer

conductors L1, L2) and the outer conductor current (phase current) I

1

are always

specified on the rating plate.